John knickbrbagkee



UNITED ,STATES PATENTOFFICE. y f:

JOHN KNICKERBACKER, or srooKroRfryNEwfrom@ cLUTcH on` PULLEY COUPLING` @i Specification of Letters Patent No. 26,369, dated Illecerxiberw;.1859;`

To all whom it may concern:

Be it known that I, J OHN, KNICKERBACKER, of the town of Stockport, in the county of 'Columbia and State of New York, have invented a new `and Improved Clutchor Coupling Pulley for Actuating Machinery; and I do hereby declare that the following is a full, clear, and exact description of the `construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a longitudinal vertical sec-` Letter E represents clutch or loose pulley.`

Letter F represents fixed or shaft pulley.

Letter a represents pins `on which the clutches vibrate. y

Letter b represents flanches or side pieces attached to disk of clutch pulley, through which the hinge pins a, pass, and between which the clutches vibrate.

Letter c represents beveled arcs attached to ends of clutch-blocks for clutching the inside of periphery of fixed or shaft pulley.

Letter d represents leather envelops on arcs to insure their adhesion to xed pulley.

Letter e represents groove in hub o movable pulley for receiving split ring, saddle or other device for operating the same.

Letter f, represents hinge flanches on clutches.

This invention is designed to actuate and to stop machinery at pleasure, without jar 0r concussion: thereby preventing the wear and tear consequent upon all abrupt checks of their motions; and consists in providing the disk of movable pulley E with three or more vibratory lever-blocks, suspended in radiating slots or mortises extending from the hub to the rim, through the said disk, and having attached to their extremities friction clutches or impellers in the form of arcs corresponding in curvature with the inner surpulleyF.

To `enable and use my invention I will describeits conf struction and operation."

face of the periphery ornband those skilled inthe artltolmake y I cut radial slots, in" breadth1aboutiequalf`1` ,3 to one third their length,extending?from"the` hub to the rim throughithefdiskiofmovable` n n pulley E; each sidelofffthese;slotsis#provided, on the inner, sideof thefdiskgbr" that l l toward the fixed pulley,with supports b, fb, 5, n l

pins a, a, 0;. Intothese slotsareinserted"` l the lever-blocks, which iwith theirarcs at#` tached I call the clutchesorliinpellerslAfA,

A. Theflanches f, f,"&c.,ion4 each"`loweruf3 margin of the lever-blo1cks"arel perforated for the fulcrum pins a, a, @,to passlthrough,

and on these the impellers vibrategso that both their contact `with and release ofthe k fixed pulley may be etlethoughimmedi-` ate-yielding yet su cieY utly Prompt, Without wrenching or jarring@ The vibratoryd,

motions of the clutches,however, arelimited by the projections or` guards D,`which pren l l vent them from falling inward whenwith drawn and hold them `to their places when moved forward and outwardftoward the` periphery of the xed pulleyF on ,being pressed up to`it";.thusfcausing them togadhere to it rmlyfandfto impel it asrequired;` To the `movable pulley Eis attached thehubfg` n C, revolving freelywonzshaftB and,providedlf;`

with a groove, e, at its outerlfendinglwhichfa to disconnect the pleasure. t .l i. `1 i The operation of my.. inventionis as fol- `9ct Split ring SaddleOfxothelyequvalnbdviei` f is to be placedwith whichi t0 comme@ and `Pulleys at asf lows: The pulleyF 1being 'attached tothe y, shaft B, and E'together with.itsattach` ments, being movable thereon, when the lat`` ter, while revolving, ispressedf forwardlso that the arcs c, c, c, come` in contactxwith the,

inside of the peripheryuor rim ofthe fixed pulley, the slight.bevel.,oftheselarcs;l ortof;

their leather `envelopsVd, d,d,`gradually increasing the radialwlengths of the clutches n from thehinge pins a,` a; a, outward, the

clutches themselves fvibrating ,outward` as they advance within .thefixedfpulle l l bined with what centrifugaliforce" they `may be allowed to exert, 1` after acquirngf the w i uisite velocity, cause theimpellers to-"ate` themselves llirmly tothe inner surface x re tac required to stop the machinery which is done by disconnecting the pulleys E and F, the operator by means of the split ring, saddle or other equivalent inserted in the groove, e,

aided by the simultaneous vibrations inward of the clutches A, withdraws the pulley E relieving the pulley F, and allowing it to stop.

I am aware that friction brakes (so called) actuated by springs, screws, toggles &c. and all attached to a thimble, have been used, sliding radially in mortises or boxes Xed upon the disk of the loose pulley, for the purpose of operating and stopping machinery'this I dornot claim-I dispense with the thimble and all of its attachments for operating the pulley F, and employ only my clutches or impellers A, A, A, for that purpose; giving them such form and suspending them in such manner as to cause them to act promptly and eiciently when in contact and yet when desired to stop the machinery, to be easily withdrawn.

The simplicity of the construction and the facility of the operation of these clutches or impellers give them the advantage and entitle them to the preference over all others now in use.

The eii'ect 0f giving to the heel of the clutch its form and weight is, with the aid of Y centrifugal force, when disconnected, and in rapid motion (its ordinary motion being rapid) to operate as a counterpoise, causing the guards D, D, D, to swing out from the rim of pulley E and revolve without clattering or noise.

What I claim as my to secure by Letters Patent of the United States is- Suspending the clutches or impellers A, A, A, in radial slots in the disk of the movable pulley E so as to allow them to vibrate, substantially in the manner and for the purpose herein set forth.

JOHN KNICKERBACKER.

Witnesses ISAAC N. COLLIER,

W. W. MENIFIELD.

invention and desire 

